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  1. Bolle

    IIsi NuBus adapter being weird but only with one specific video card

    It’s not uncommon that voltage regulators on Nubus or PDS cards are fed by the 12V line. DACs with external voltage references, high frequency clock generators that need their own 5V supply decoupled from the main 5V rail, ethernet cards with BNC usually also need 12V for the voltage regulator...
  2. Bolle

    SE/30: Invert screen pixels?

    No extra hardware needed to accomplish this… the serial output stream of video data runs through one of the PALs, so you can just invert the output polarity in the fusemap and burn a replacement.
  3. Bolle

    Do the classic Macs support DMA?

    PDS and Nubus cards can theoretically do DMA in all Macs, but there are only very few cards that actually did make use of it.
  4. Bolle

    PowerBook 500 Series full 040 CPU swap

    That looks really good. Did they just cut out part of the PCB around the chip? 😅 Mine at least came on an interposer that could be reused at some point. As mentioned in the other thread somewhere, the swap is going to work with standard 520/540 CPU cards. The 550 ROMs are not needed for the...
  5. Bolle

    Troubleshooting GLUE, C32M, and C16M

    That's right, UI6 is just acting as a driver for the clock signal though and it needs the 16MHz input signal on pin 2 to generate it. And that input is fed by C16G which originates from the GLUE.
  6. Bolle

    Macintosh IIfx logicboard recreation

    And finally took some time to do some boring work and cleaned up the schematics. Those will probably help anyone troubleshooting a real or reloaded board.
  7. Bolle

    Quadra 700with no Video Output ...

    Like so? https://archive.org/details/macintosh-quadra-700-schematic
  8. Bolle

    SE/30 (and others) RTC Replacement / Emulator with ATTiny85

    Could you implement the same changes in the AttinyRTCmodule code as well so I can try if that helps with the problems I've got with it in the IIfx because: ...sounds a lot like what the IIfx is doing as well. Even if I take a module over from the SE/30 and plug it into the IIfx all settings...
  9. Bolle

    croissantking's conquests

    Ha yeah, that sounds about how I got mine. Very unlikely for it to be not real in that case.
  10. Bolle

    croissantking's conquests

    Curious if it's going to be a real one or not. I can tell swapping a full 040 onto a CPU board from a 520/540 does indeed work just fine, the 550 ROMs are not needed for the FPU to do its thing.
  11. Bolle

    SuperMac PDQ, Spectrum 8, 24, Thunder ROMs

    Thread is about ROM dumps, but I guess this fits in as well while we're at it... put my hands on one of my Thunder DSP boards, desoldered the GALs and extracted some fusemaps to add to the archive.
  12. Bolle

    Reverse-engineering the Lapis ProColorServer 8 II

    Yeah, already know that you can right click the cells from Kens implementation for the XC2064. The data bus lines are all just bidirectionally going from one I/O to another with a logic cell controlling the output enable for each direction individually: Everything that's connected is relevant...
  13. Bolle

    Reverse-engineering the Lapis ProColorServer 8 II

    Wow, that was quick indeed. Just right when I figured out how to convert my files. Just dragging them on is much easier though :) The layout it produces seems indeed to be pretty accurate. From what I can tell by comparing the schematics for the accelerator I'm working on at the moment with the...
  14. Bolle

    Reverse-engineering the Lapis ProColorServer 8 II

    I've got a few XC2018 bitstreams right here that I wanted to throw at it, but what exactly does it expect from the RBT file? Is that just the hex dump that my programmer spits out when reading a config ROM converted to binary one for one?
  15. Bolle

    Reverse-engineering the Lapis ProColorServer 8 II

    Just as others have already said, monitoring this with great interest. Not so much because of the video card but that's some valuable work on the FPGA bitstreams right there. This looks really promising.
  16. Bolle

    Carrera SE30 control and Bolle Carrera040 in the Mac SE/30

    Oh damnit, forgot to answer your PM you sent a few days ago. That's what you get for reading PMs on your phone... as soon as it's not shown as "unread" anymore it's basically gone. The unpatched control panels don't work at all in the SE/30 as you can see. There has been a new patched one that...
  17. Bolle

    Macintosh IIfx logicboard recreation

    I've been working on recreating the IIfx logicboard on and off for quite a while. Checking the date of creation of the schematics file it reaches back to September '21. I started by working my way through the BOMARC schematics and transcribing them into Eagle. Everyone who ever just looked at...
  18. Bolle

    Anybody here ever run a IIfx with A Tokamac accelerator?

    Digging up this old thread... I just finished writing equations to match the original PAL at UK7. It was quite tricky to figure out and took a while until I catched all possibilities. Here's the signals that are connected to the inputs and outputs: /DS - data strobe connected to CPU...
  19. Bolle

    obsolete's SE/30 Reloaded Build

    Nope, they fixed the memory issue externally in a PAL on the IIcx and SE/30. I do have one of my Mac II boards modified in a similar fashion and it runs just fine with high >1MB RAM SIMMs.
  20. Bolle

    obsolete's SE/30 Reloaded Build

    II, IIx, IIcx and SE/30 GLUEs are identical. The video part of the SE/30 is done entirely in the 4 PALs that act like a PDS card to the rest of the system.
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